Plastic pollution in the Sundarbans is increasing at an alarming rate due to coastal rivers, local markets, sea-going fishing activities, and tourism, posing a severe threat to the mangrove forest's biodiversity. Major sources of plastic pollution include coastal markets and settlements: plastic cups, plates, and polythene discarded from markets and settlements near border rivers—such as the Shibsa, Kapotaksho, Shela, and Baleswar—are carried into the forest by tidal currents. Fishing boats and trawlers: plastic bottles, food packets, and torn nets used on both deep-sea and local fishing boats are dumped directly into the rivers. Lack of Dustbins: Due to the absence of adequate dustbins at tourist spots, boat terminals, and jetties, neither tourists nor locals have designated places to dispose of waste. Damage to Biodiversity and the Environment (Fisheries and Soil): Casting nets in the river yields packets of chips and polythene instead of fish, while accumulated plastic in the soil of the river islands prevents new vegetation from growing. Plastic-Littered Tourist Spots: Even before the start of the tourist season, piles of waste have been observed at locations such as Kotka, Kachikhali, Jamtala, Dimer Char, and Andarmanik.Research on the presence of microplastics (2020–2022) in water and soil: An average of 2.22 microplastics per liter of water and 734 microplastics per kilogram of soil were found. In the bodies of marine organisms: An average of 3.02 microplastics per snail and 4.26 microplastics per marine fish were detected.Waste removal and measures taken—TOAS campaign: The Tour Operators Association of Sundarban (TOAS) removed 12 sacks of plastic waste in May and another 15 sacks over three days in September, subsequently dumping them in Khulna. Ban on single-use plastics: TOAS has prohibited single-use plastics on its vessels and initiated efforts to raise awareness among tourists. Stance of the Forest Department: Although carrying and discarding plastic in the Sundarbans is prohibited, it has not been possible to completely prevent waste from drifting in via the waterways.Proposed Solution To protect the Sundarbans, it is essential to establish a waste management system through the coordinated efforts of not only tourists but also the local administration, the Department of Environment, local business owners, and sea-going fishermen.